udp6: don't make extra copies of iflow

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udpv6_sendmsg() first initialises an on-stack 88B struct flowi6 and then
copies it into cork, which is expensive. Avoid the copy in corkless case
by initialising on-stack cork->fl directly.

The main part is a couple of lines under !corkreq check. The rest
converts fl6 variable to be a pointer.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Pavel Begunkov 2022-01-27 00:36:29 +00:00 • committed by Jakub Kicinski

parent f37a4cc6bb

commit 5298953e74

1 changed files with 42 additions and 43 deletions

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net/ipv6/udp.c

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